Preparation of bimodal porous alumina using propylene glycol oligomers

Bimodal porous alumina was prepared from the solution with aluminum chloride and 1,2-propylene oxide by adding propylene glycol oligomers (PPG). Because of hydrophobic nature of PPG, the addition of PPG induces phase separation during sol–gel reaction, and macroporous morphologies are formed by fixi...

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Bibliographic Details
Published in:Journal of the Ceramic Society of Japan 2017/10/01, Vol.125(10), pp.742-746
Main Authors: TAKAHASHI, Ryoji, ONISHI, Akiko, SATO, Fumiya, KURAMOTO, Makoto
Format: Article
Language:English
Subjects:
Aluminum chloride
Aluminum oxide
Bimodal porous alumina
Chemical industry
Ethanol
Oligomers
Phase separation
Phase transitions
Poly(propylene glycol)
Propylene
Propylene oxide
Sol-gel processes
Spinodal decomposition
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Summary:Bimodal porous alumina was prepared from the solution with aluminum chloride and 1,2-propylene oxide by adding propylene glycol oligomers (PPG). Because of hydrophobic nature of PPG, the addition of PPG induces phase separation during sol–gel reaction, and macroporous morphologies are formed by fixing transitional structure of phase separation. Since ethanol works as a co-solvent, the macropore size of the obtained gel can be increased by decreasing ethanol content. Change in the concentration of other constituents such as PPG has also an effect to control morphologies through changing the timing of phase separation and sol–gel transition.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.17062